Dermatophytosis in Clinical Practice: Epidemiology, Clinical Spectrum, Laboratory Diagnosis and Emerging Challenges

Abstract

Background: Dermatophytosis is a common superficial fungal infection involving keratinized tissues such as the skin, hair, and nails. The disease remains an important clinical and public health problem, particularly in tropical and subtropical regions where temperature, humidity, overcrowding, occupational exposure, and socioeconomic conditions may facilitate transmission. The clinical presentation varies according to the anatomical site involved and may range from localized lesions to chronic and recurrent disease. Objective: This review discusses the epidemiology, clinical manifestations, causative dermatophytes, laboratory diagnosis, and important challenges associated with the management of dermatophytosis. Methods: Relevant concepts concerning dermatophyte infections, clinical presentation, conventional laboratory diagnosis, and epidemiological characteristics were reviewed. Particular attention was given to direct microscopy, fungal culture, and phenotypic identification methods used in routine microbiology laboratories. Discussion: The three classical genera associated with dermatophytosis are Trichophyton, Microsporum, and Epidermophyton. Among these, Trichophyton species are frequently encountered in clinical specimens. Dermatophytosis may manifest as tinea corporis, tinea cruris, tinea capitis, tinea faciei, tinea pedis, tinea manuum, tinea barbae, and tinea unguium. Clinical diagnosis may sometimes be difficult because dermatophytosis can resemble several inflammatory and infectious dermatoses. Direct potassium hydroxide examination provides a rapid method for demonstrating fungal elements, whereas culture permits isolation and further identification of the causative organism. Combining clinical assessment with appropriate laboratory investigation improves diagnostic confidence and assists in selecting appropriate treatment. Conclusion: Dermatophytosis continues to represent a significant burden in clinical practice. Early recognition, appropriate specimen collection, direct microscopy, culture-based identification, and awareness of local epidemiological patterns are important for accurate diagnosis and effective management. Continued surveillance is necessary because the epidemiology and clinical behavior of dermatophyte infections may vary between geographic regions.